abfactory.c

来自「Design Pattern C Source Code」· C语言 代码 · 共 93 行

/*
*/
#include "C++/MazeParts.H"
#include "C++/MazeGame.H"
#define MazeFactory_H
/*
*/
class MazeFactory {
public:
    MazeFactory();
/*
*/
    virtual Maze* MakeMaze() const
        { return new Maze; }
    virtual Wall* MakeWall() const
        { return new Wall; }
    virtual Room* MakeRoom(int n) const
        { return new Room(n); }
    virtual Door* MakeDoor(Room* r1, Room* r2) const
        { return new Door(r1, r2); }
};
/*
*/
Maze* MazeGame::CreateMaze (MazeFactory& factory) {
    Maze* aMaze = factory.MakeMaze();
    Room* r1 = factory.MakeRoom(1);
    Room* r2 = factory.MakeRoom(2);
    Door* aDoor = factory.MakeDoor(r1, r2);

    aMaze->AddRoom(r1);
    aMaze->AddRoom(r2);
/*
*/
    r1->SetSide(North, factory.MakeWall());
    r1->SetSide(East, aDoor);
    r1->SetSide(South, factory.MakeWall());
    r1->SetSide(West, factory.MakeWall());
/*
*/
    r2->SetSide(North, factory.MakeWall());
    r2->SetSide(East, factory.MakeWall());
    r2->SetSide(South, factory.MakeWall());
    r2->SetSide(West, aDoor);

    return aMaze;
}
/*
*/
class EnchantedMazeFactory : public MazeFactory {
public:
    EnchantedMazeFactory();
/*
*/
    virtual Room* MakeRoom(int n)  const
        { return new EnchantedRoom(n, CastSpell()); }
/*
*/
    virtual Door* MakeDoor(Room* r1, Room* r2)  const
        { return new DoorNeedingSpell(r1, r2); }
/*
*/
protected:
    Spell* CastSpell() const;
};
/*
*/
#define EnchantedMazeFactory_H
#include "C++/MazeFactories.H"
/*
*/
Wall* BombedMazeFactory::MakeWall () const {
    return new BombedWall;
}
/*
*/
Room* BombedMazeFactory::MakeRoom(int n) const {
    return new RoomWithABomb(n);
}
/*
*/
void dummy() {
/*
*/
MazeGame game;
BombedMazeFactory factory;

game.CreateMaze(factory);
/*
*/
}
/*
*/